Crankshaft Position (CKP) Sensor
WARNING: This page is about a different car, the 1996 Acura SLX. However, it is still accessible from the selected car via links, so may be relevant.
CKP sensor is located in distributor housing or engine block. CKP sensor detects engine speed and relative position of each piston. With this information, ECM calculates ignition timing and dwell angle.